Phenol esters and amides and polymers stabilized therewith
AssigneeCiba-Geigy Corporation
InventorsAndreas Schmidt, Kurt Schwarzenbach
Life of this patent
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AssigneeCiba-Geigy Corporation
InventorsAndreas Schmidt, Kurt Schwarzenbach
Estimating the term…
Compounds of the formula I ##STR1## in which R.sub.1 and R.sub.2 independently of one another denote alkyl, cycloalkyl or aralkyl, R.sub.3 denotes hydrogen or, conjointly with R.sub.1, denotes tetramethylene, R.sub.4 denotes hydrogen or lower alkyl or, conjointly with R.sub.2, denotes tetramethylene, R.sub.5 denotes hydrogen, alkyl, aralkyl, acyloxyalkyl, oxaalkyl or phenyl, R.sub.6 denotes hydrogen, alkhyl, phenyl or the group or, conjointly with R.sub.5, denotes alkylene, R.sub.7 denotes hydrogen, alkyl, phenyl, benzyl or alkylphenyl or, conjointly with R.sub.5 or R.sub.6, denotes alkylene or, conjointly with R.sub.5 and R.sub.6, denotes alkanetriyl, R.sub.5, R.sub.6 and R.sub.7 together containing at least one carbon atom, Y denotes --O-- or --NH--, P denotes 1, 2, 3 or 4 and A denotes hydrogen or a group which is derived from an organic or inorganic oxygen acid A-(OH).sub.p, are suitable for stabilizing organic material against thermo-oxidative degradation.
A compound of the formula
A compound of the formula ##STR162## wherein R' is alkyl having 1-4 carbon atoms and A is an acyl group derived from trimellitic acid.
A compound of the formula ##STR163## wherein R.sub.1 is alkyl having 1-4 carbon atoms, and A is an acyl group derived from thiophene 2,5-dicarboxylic acid, or N,N'-piperazine bis oxamide.
Dependencies are inferred from the claim text.